JP3854407B2 - Ventilation fan control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a control device for a ventilation fan provided at least in the vicinity of a cooking device provided with a grill.
[0002]
[Prior art]
During cooking, smoke, steam, or odor is generated, so a ventilation fan is often provided near the cooking device. In particular, in a combustion-type cooking device, oxygen in the air is consumed, so the necessity for ventilation increases.
[0003]
In a cooking device using a gas fuel such as city gas, a safety device is provided to stop the supply of the gas fuel when the flame disappears due to spillage or the like, although heating is performed during ignition. In addition, during cooking using oil, the temperature of the bottom of the pan where the oil is stored is detected so that the temperature of the oil does not rise spontaneously, and the fuel is supplied before reaching the temperature at which it may ignite spontaneously. A function to automatically stop is also being used.
[0004]
[Problems to be solved by the invention]
Although various safety measures have been taken for the cooking device, it is not enough to give consideration to the point of keeping the environment comfortable during cooking by appropriate ventilation. For example, if a powerful ventilation fan is provided and the ventilation fan is always operated, ventilation is sufficient, but noise and unnecessary energy consumption become problems. When the air flow of the ventilation fan is insufficient, ventilation cannot be performed sufficiently. However, some cooking devices include a plurality of stoves and grills, such as a household gas table, and the number of operating units may change as necessary. As a ventilation fan corresponding to such a gas table or the like, it is preferable that the air volume can be switched in a plurality of stages or continuously. Even if the air volume of the ventilation fan can be switched, it is troublesome to always set an appropriate air volume.
[0005]
The objective of this invention is providing the control apparatus of the ventilation fan which can be controlled so that it may become an appropriate air volume corresponding to the driving | running state of a heating cooking apparatus.
[0006]
[Means for Solving the Problems]
The present invention is provided at least in the vicinity of a cooking device provided with a grill , and at least a ventilation fan capable of switching the air volume between large, medium and small is linked to the operation of the cooking device when cooking with at least the grill. A control device for controlling,
A temperature sensor for detecting the temperature of the grill;
In response to the output from the temperature sensor, it is determined whether the detected temperature of the grill is lower than a predetermined reference temperature. When the detected temperature is lower than the reference temperature, the air volume is medium and the detected temperature is higher than the reference temperature. A ventilating fan control apparatus comprising airflow control means for controlling the airflow of the ventilating fan so that the airflow becomes large at a certain time.
[0007]
According to the present invention, the temperature of the grill provided in the cooking device is detected by the temperature sensor, and the air volume of the ventilation fan is controlled by the air volume control means based on the detection result. The ventilation fan can switch the air volume between large, medium and small, and the air volume control means responds to the output from the temperature sensor, and when the detected temperature is lower than the reference temperature, the air volume becomes medium and the detected temperature is the reference. When the temperature is higher than the temperature, the air volume is controlled so that the air volume becomes large. For example, when grilling fish is cooked and it is easy to produce smoke, even if the detected temperature is lower than the reference temperature, the air volume of the ventilation fan is controlled not to be small, but when the detected temperature is above the reference temperature Controls the air volume greatly. Thereby, appropriate ventilation can be performed according to the use condition of a heating cooking apparatus.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a schematic electrical configuration of an embodiment of the present invention. In the vicinity of the gas table 1 which is a heating cooking device, a ventilation fan 2 is provided which can be operated by switching the air volume into three stages of large, medium and small. A signal cable 3 is disposed between the gas table 1 and the ventilation fan 2. An interlocking signal for interlocking the operation of the gas table 1 and the operation of the ventilation fan 2 is transmitted to the signal cable 3.
[0013]
The gas table 1 is provided with, for example, a plurality of stoves 10a and 10b (hereinafter collectively referred to as reference numeral “10”). The stove 10 is provided with a temperature sensor 11 for preventing overheating and preventing extinction. The gas table 1 is also provided with a grill 12 for heating the whole object such as fish. The temperature in the grill 12 is detected by a temperature sensor 13. The detection outputs of the temperature sensors 11 and 13 are derived as interlocking signals to the signal cable 3 via the terminals 14.
[0014]
The ventilation fan 2 is provided with a fan 20 for ventilation and is driven to rotate by a motor 21. The rotational speed of the motor 20 is switched by the air volume control switching device 22. The microcomputer 23 determines the operating state of the gas table 1 based on the outputs of the temperature sensors 11 and 13 of the gas table 1 given through the signal cable 3 in accordance with a preset program so as to obtain an appropriate air volume. A signal is given to the air volume control switching device 22.
[0015]
FIG. 2 shows an example of the gas table 1. The gas table 1 includes two stoves 10a and 10b and one grill 12. In each stove 10a, 10b, for example, when cooking in a pot, if the flame disappears due to spilling or wind, the gas supply is automatically turned off, and a safety device for extinction to prevent gas leakage, An overheat prevention device that detects the temperature and automatically stops the gas supply before reaching the spontaneous ignition temperature such as tempura oil is provided, and the temperature sensor 11 shown in FIG. 1 is used for these.
[0016]
FIG. 3 shows a schematic configuration of the extinguishing safety device provided in the stove 10 of FIG. As shown in FIG. 3A, the electromagnet 33 of the electromagnetic valve unit 32 can attract the iron piece 34 and keep the safety valve 35 open by the thermoelectromotive force of the thermocouple 31. . As shown in FIG. 3B, when the tip of the thermocouple 31 is not heated, the electromagnet 33 of the electromagnetic valve unit 32 cannot attract the iron piece 34, and the safety valve 35 is closed. When a person presses an ignition knob or a button, the interlocking push rod 36 presses the safety valve 35 of the electromagnetic valve unit 32, so that gas is supplied and the stove can be ignited as shown in FIG. become. When the stove is ignited, a pilot flame 37 is generated and the tip of the thermocouple 31 is heated, so that a current due to the thermoelectromotive force flows through the coil of the electromagnet 33 and attracts the iron piece 34 attached to one end of the safety valve 35. To do. If the hand is released from the ignition knob or button in this state, the push rod 36 is returned to its original position by a spring or the like, but the safety valve 35 remains open, and the gas flows and the stove 10 can be used. If the flame disappears due to wind or spillage while the stove 10 is in use, the thermocouple 31 is cooled and the generation of the thermoelectromotive force is eliminated, so the electromagnet 33 loses its attractive force, and the safety valve 35 is restored by the spring force. Returning to FIG. 3, the gas passage is closed and the gas supply is stopped as shown in FIG. Since the thermoelectromotive force of the thermocouple 31 is determined according to its type, it can also be used as the temperature sensor 11.
[0017]
FIG. 4 shows the air volume control switching operation of the ventilation fan 2 by the microcomputer 23 of the ventilation fan 2 with respect to the gas table 1 provided with the extinguishing safety device shown in FIG. 3 in the stove 10a, 10b of FIG. In step a1, when any of the stoves 10a, 10b or the grill 12 of the gas table 1 is ignited, the control is started. In step a2, based on the output from the thermocouple 31 of the extinguishing safety device for the stove 10a, 10b and the output from the temperature sensor 13 of the grill 10, the operating number of the stove 10a, 10b or the grill 12 in use is determined. judge. In step a3, the air flow is switched according to the number of operating units. For example, when all of the stoves 10a and 10b and the grill 12 are operated, the air volume is switched to a large value, and when it is two, the medium is switched to a small value. When the air volume switching is completed, the air volume switching procedure corresponding to the number of operating units is terminated in step a4.
[0018]
FIG. 5 shows a schematic configuration of a tempura oil overheat prevention device incorporated in the stove 10a, 10b and the like of FIG. A pan bottom temperature sensor 41 is brought into contact with the bottom of a pan 40 such as a frying pan for storing tempura oil by a spring. A pot bottom temperature signal indicating the temperature of the bottom of the pot 40 detected by the pot bottom temperature sensor 41 is given to the control circuit 42. The control circuit 42 controls the safety valve 43. When the pan bottom temperature sensor 41 detects that the pan bottom temperature has reached 350 ° C., which is the spontaneous ignition temperature of tempura oil, the control circuit 42 closes the safety valve 43 and shuts off the gas supply. When the safety valve 43 is not actuated and closed, the gas burner 45 can be ignited by operating the ignition / digestion button 44. Further, the control circuit 42 is also given a flame signal from the thermocouple 31 for constituting the extinguishing safety device, and controls the safety valve 43 to realize the same function as in FIG.
[0019]
FIG. 6 shows another embodiment of the present invention, in which a pan bottom temperature sensor 41 for preventing overheating as shown in FIG. 5 is used as the temperature sensor 11 in FIG. 1 to switch the air volume of the ventilation fan 2 in FIG. Show the procedure. When the use is started by ignition of the stoves 10a and 10b of the gas table 1 in step b1, in step b2, the thermoelectromotive force indicated by the pan bottom temperature signal output from the pan bottom temperature sensor 41 is converted to the pan bottom temperature. In step b3, the pan bottom temperature is compared with a reference temperature, for example, 100 ° C. 100 ° C. is a boiling temperature of water often used for cooking, and when this temperature is exceeded, the degree of generation of steam and odor increases. When the pan bottom temperature is lower than around 100 ° C., only a small amount of exhaust is required, so the air volume is set to be small in step b4. When the pan bottom temperature is about the same as around 100 ° C., the air volume is set to small to medium on the assumption that it is in a boiling state and used for cooking. When the pan bottom temperature is higher than around 100 ° C., it is assumed that the pan is an oil dish, and the air volume is set large in step b6. After the air volume is set in step b4, step b5 or step b6, the air volume is switched to the set air volume in step b7, and the procedure is terminated in step b8.
[0020]
FIG. 7 shows a procedure for switching the air volume of the ventilation fan 2 according to the output of the temperature sensor 13 of the grill 12 of FIG. 1 as still another embodiment of the present invention. When the grill 12 of the gas table 1 is ignited in step c1, the temperature detected by the temperature sensor 13 is input in step c2. In step c3, it is determined whether or not the input detected temperature is lower than a preset reference temperature. When the detected temperature is lower than the reference temperature, the air volume is set to medium in step c4. When it is determined in step c3 that the detected temperature is equal to or higher than the reference temperature, the air volume is set large in step c5. After the air volume is set in step c4 or step c5, the air volume is switched to the air volume set in step c6, and the procedure is terminated in step c7.
[0021]
In the grill 12, for example, cooking such as fish is performed and smoke is easily generated, so even if the detected temperature is lower than the reference temperature, the air volume of the ventilation fan 2 is set not to be small but inside. When the temperature is high, the air volume is set large.
[0022]
In each of the embodiments described above, the ventilation fan 2 can switch the air volume to three stages of large, medium, and small, but even if it can be continuously switched even in two stages of large and small or more stages. Good. Multi-stage or continuous switching is troublesome when performed by human operation. However, when automatic switching is performed as in the present embodiment, an appropriate air volume can be obtained as necessary, which is preferable.
[0023]
In the configuration of FIG. 1, the signal transmission between the gas table 1 and the ventilation fan 2 is performed via the signal cable 3, but it is also possible to perform the transmission via an optical fiber or the like. In addition to signal transmission by wire, it is also possible to transmit a signal via a radio signal, for example, a radio wave or an infrared ray. Further, the temperature sensor 11 can be installed exclusively for the extinction safety device or for preventing overheating.
[0024]
【The invention's effect】
As described above, according to the present invention, the ventilation fan provided in the vicinity of the cooking device can be appropriately controlled in accordance with the operation state of the cooking device, that is, cooking using the cooking device. it can.
[Brief description of the drawings]
FIG. 1 is a diagram showing a schematic electrical configuration of an embodiment of the present invention.
FIG. 2 is a diagram showing an example of a gas table 1;
FIG. 3 is a diagram showing a schematic configuration of a turn-off safety device provided in the stove 10a, 10b of FIG.
4 is a diagram showing a switching operation of the air volume control of the ventilation fan 2 by the microcomputer 23 with respect to the gas table provided with the extinguishing safety device shown in FIG. 3 in the stove 10a, 10b of FIG.
5 is a diagram showing a schematic configuration of a tempura oil overheat prevention device incorporated in the stove 10a, 10b, etc. of FIG.
6 is a diagram showing a control procedure for switching the air volume of the ventilation fan 2 of FIG. 1 by using a heating-preventing pan bottom temperature sensor 41 as shown in FIG. 5 as still another embodiment of the present invention. .
7 is a diagram showing a procedure for switching the air volume of the ventilation fan 2 in accordance with the output of the temperature sensor 13 of the grill 12 of FIG. 1, as still another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1, Gas table 2 Ventilation fan 3 Signal cable 10, 10a, 10b Stove 11, 13 Temperature sensor 12 Grill 14 Terminal 20 Fan 21 Motor 22 Air volume control switching device 23 Microcomputer 31 Thermocouple 32 Electromagnetic valve unit 35 Safety valve 41 Pan bottom temperature sensor 42 Control circuit 43 Safety valve

Claims (1)

At least a control device that is provided in the vicinity of a cooking device provided with a grill and that controls a ventilation fan that can switch between large, medium, and small airflow in conjunction with the operation of the cooking device when cooking with at least the grill Because
A temperature sensor for detecting the temperature of the grill;
In response to the output from the temperature sensor, it is determined whether the detected temperature of the grill is lower than a predetermined reference temperature. When the detected temperature is lower than the reference temperature, the air volume is medium and the detected temperature is higher than the reference temperature. A ventilating fan control device comprising: an airflow control means for controlling the airflow of the ventilation fan so that the airflow becomes large at a certain time.

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